Opera is a full-featured Internet tool, most notably a fully standard conforming Web browser. Opera includes pop-up blocking, tabbed browsing, integrated searches, and advanced functions like a password manager, mouse gestures, native Scalable Vector Graphics (SVG) support, an email program, RSS newsfeeds, and IRC chat. It is designed to be fast andhighly customizable.
If you want to install opera Web browser you need to edit your /etc/apt/sources.list file and enter the source list and save your file.
add the following souce
For Debian Sarge
deb http://deb.opera.com/opera sarge non-free
For Debian etch
deb http://deb.opera.com/opera etch non-free
For Debian sid
deb http://deb.opera.com/opera sid non-free
Import to key using the following commands
gpg --keyserver subkeys.pgp.net --recv-key 6A423791
gpg --fingerprint 6A423791
gpg --armor --export 6A423791| apt-key add -
Now you need to update the source list using the following command
Install Opera in Debian
#apt-get install opera
This will complete the opera installation.
After finishing the installation if you want to open opera go to Applications—>Internet–>Opera and you can see in the following screen
Once you start opening this first time you need to agree the license agreement you need to click on I agree
Opera Web Browser in action
Opera Web Browser Version Details